Buried amid the complexity of the human brain, a newly described scaffold carries important messages from one place to another. A map of the scaffold, which reveals intricate connections made by bundles of nerve fibers called white matter tracts, could help explain why some brain injuries are particularly devastating.

The scaffold, described February 11 in Frontiers in Human Neuroscience, is distinct from other descriptions of neural connections in the human brain (SN: 2/22/14, p. 22). Instead...